Motor-control apparatus.



rrifiii 'U NITED STANLEY G. l JERSEY.

Application lcnl Augrisl t To a/Z'Z whom 16 isi/nay @wisc-:lia:

Be it lmoivii that 'l7 GEORGE W. Emma, L: Citizen of the United States, 1% ing at i field, county of" Berkshirs, trl/tc of' Mass-h l chusetts, have invented certain new and usri ful Improve/nights ih lilul,oi'-loiiti0l iii"A 1'atus,0i` Whih the ihllowiiw is i Silico/ihm@ i The present invention i les to :ipparatua-z for coiitrolliiig the operatiii 0l electric ihotors, and particularly' in :litmtioiis where, :is for example in the 0pm .m u? print' presses, it is desirable that me, operator ,3l have complete coiitiul ov t le ziiotor order to-start or stop thv. slime Qi' run it my speed ind still he am' ly 'free to Wauu; the operation of the prima Leii making' th; l necessary preliminary :i ljiistiiieiitsj.

The object 0i' the pres' 'Giitioii provide a simple ami iziexpr ive apparati@ i y whereby au operator muy sia-rt anni step a, j motor quickly :intl cause it trim any cle- Sired speed Within hertz-iii li lits withuut hair ing his attention dislrautcd from the w01 l which is being done.

To the above and, l haw associaied ztstaitiiig rheosta-t having' a srihg returned l arm :uid an electro-iiiiigiistically-nctufitoll cati/h for holding the :mh iii :my operz positiuh when current is llo 'hrsg' thrriugh t, h motor, u, handle ier operzimfg the iiioviim; im hr firm 0ll the rhcotfit from any desirrl poiii'l 011 or adjuvant. to the machina .x'himlx is drivin 1 by thc motor, said handle liaiifr wl 1 with zi push button 'l'iir sho'tir tlitl clcctroiiiaguet which williams lh@ mw* The present iuwsiitioli will lie more 'iiiillj-y; g uiidcrswod from the 'liolluwiii' detailed ilul suri'ptioh thereof taken iii connection with the accompanyingdrawing. f

ln said. drawing, .Figi v 1 illustrates i I l ixiotor mounted upuii :i suuitlilo has@ ansi starting rheostzit located iii the has@ und lia. i ing (zoiu'ickztml thereto i handle in acordamos i with the present invention; Figa. 2 illustriiiw diagriiilimatically thu Starting rhwsmt, the. motor, and thu connections between thi sama :ind :i source mi' @uri-eht supikily.

Reference being hull to the; (inni-ing, l reci t resents :i motor imiuiilml il', Huila-ble hi. z

printing r0ssu it l .'il' mui-mf u Stood that the hais@ 111,14/ ha: uirxiLLt-d. mi

sp'iiiig-i i'ifss(d push button 23'. it will be seen that il, zit any time while the inotor is in opera-lion, the push button is pressed,

pperzilive positions olx the rheostzit zirni.l

rllnoperator nniv then release the handle, tle i'lwosi'nt nin will helocked'in the position which it hns nssinned, :ind lho-inotor will wonlinue 1o opt-rule it :i definite spoed. when il is desired lo stop the inoi'or, the operator simply presses the push button 23, thus4 slioi't-ciriuiting elrctronmgnet 14 sind rnusingxj thoihoostzit :irni to be returned to its l"'o'll"v7 position` Il, on the other hand, :i highr speed is reduired,'zi further pull on the handle 17 will bring the rheostzit firm into the running' position which provides 'l'or the higher speed. ln this Way the iiiotor niiiy be. stru-lod und stopped with certainty :ind muy b l :nude to run zit any speed Without necessitating; the withdrawal ol' the operators fitlenlion [Troni his work. Furthermore, the rel urn ol' the rheostat zirni to its olli position before the motor circuit is broken insures thnt the niotor when started isfrlwfiys pron-Vieil by full resistance.

lil'iliongli l luive descrlliid ii'Li'/.detziil :i prcl'eired form ol' the presenteinvention and zi stsn'iin;P` rlicos-lzit well inliip'lcd for use iii cerf :"ving it ont7 i do not desire to liniit the preslent invention to the particulzir detailsvshown and described except to the extent indicated in the accompanying claims, since the structurzil details may assumo various lfoi'nis.

What I claim as new and desire to secure by Letters Patent of the United States, is:

l. li'ry combination, ny motor-starting rheostat having a movable Contact nieniber tending normally to assume its oll'H position, electro-magnetic locking,r niezins for holding said contact nieniber in :i running' position, e handle for opera-ting sziid Contact ineinber, .find ay switch carried by said handle for controllingv said clectrosinzie'nelic locking nieans.

2. ln combination, fi motor-starting rheostatt having' :i spring' returned zirni, it witch for locking' said :irin iii :L running` position, :in elcirtroinaignet l'or moving' sind mitch into operative relation with snid erin, :i lnindlo for operating;` 'sind zirni, :i switch in sind lmndle, und electrical connections between the inenibers ol said switch :ind the terminals oi' ,seid eloctronizignet.

3. ln combination, a, niotor-stzn'ting i'hvostat hirvingi` a` niovable Contact inei'nber tending normally to nssunie its oll' position, electro-niagiicticfrlly-actuated ineains lior (ing said Contact' iiieinhir iii :i running position, it flexible operating` nien-ibex' con- .nccted to said erin, :L switch carried by seid 'flexible nieinber, and electrical connections ,extending troni said switch to sind elet-tro- In:igncticfilijf-actuated means.

Iii witness whereof, 'I have hereunto set my hand this 29th dziyoll -iugfush 190.3.

Gl `(f)l((ll) W, lli'llil-. litnessesz I. Fonn'es Tiioiirsox ('ui.i.i;xs, iinimiiicii )linimy Pnrr'r. 

